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n. The region near or immediately within a bacterial or other cell wall, outside the plasma membrane.

n. The region between the plasma membrane and the outer membrane or cell wall.

n. In the Peronosporeæ, a delicate hyaline peripheral layer of protoplasm, which in the pollinodium and oögonium becomes differentiated from the granular central mass, or gonoplasm. It does not share in the conjugation. See gonoplasm.

n. In ferns, the residuum of the dissolved tapetal walls, which forms a mucilaginous protoplasmic mass in which the spores eventually lie embedded.

"First, instead of the flagella sticking outside of the cell and doing what any self-respecting flagellum would do, the flagella of spirochetes rotate entirely within the periplasm the space between the inner and outer membrane, which includes the cell wall."

gonoplasm    cytoplasm    ooplasm   

periplasmic   

periplasmic space